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What is Methods?

Methods are used to perform specific operations on variables, which depends on the value that you want to get from the method, such as addition, subtraction, and getting average of two variables. Variables are useless without methods because the variables are initialized within a method and can be accessed in the Main Sub procedure by using that particular method. A method mayor may not return a value. A method, which returns a value, is called a function and a method, which does not return a value, is called a Sub procedure. The syntax to declare a function is as follows:

[access modifier] Function <function-name>(parameter-list) AS type

function-body

End Function

Function is a keyword used to declare a function and parameter-list represents the list of parameters that the function accepts. The type represents the return type of the function.

The syntax to declare a Sub procedure is as follows:

[access modifier] Sub <sub procedure-name>(parameter-list) As type

sub procedure-body

End Sub

In the preceding syntax, we have placed the access modifier inside square brackets ([ ]), which represents the use of an access modifier as optional. Here Sub is a keyword that is used to declare a Sub procedure and parameter-list represents the list of parameters that the Sub procedure accepts. The type represents the return type of the Sub procedure.

The definition of a class having variables and methods is given in the following code snippet:

class circle

Private radius AS Integer = 2

private Const PI AS single = 3.14

Public sub area()

Dim res As single = PI * radius * radius End sub

End Class

In the preceding code snippet, we have declared a class circle. Inside the class, we have declared an integer variable, named radius, a constant, named PI, and a Sub procedure, named area.

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